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  #1  
Old 02-14-2010, 12:50 PM
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Transmission Reliability

It appears that the '00-'03 5 spd auto transmissions are rather prone to premature problems or failure. Are the '04-06 6spd versions any better? TIA.
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Old 02-14-2010, 12:53 PM
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In short, not really. The transmissions may be a weak point in the X drive train but not to an extreme extent.
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Old 02-14-2010, 02:14 PM
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I think the tranny problems with the X are like the tranny problems with the earlier Dodge Rams. You heard about a lot of failures, and how crappy they are, but with regular service, they seem to live an average to long life. Change the fluid every 50k miles, and drive it until it dies.
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Old 02-14-2010, 03:48 PM
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as that the only way to keep them reliable. Ignore BMW's recommendations, which they no longer recommend on their newer cars. It seems to me the 6spd's have more problems than the 5's.
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Old 02-14-2010, 05:01 PM
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My 6 speed ZF on my o4 X5 got rebuilt at 100,000kmhs, there seems to be debate on changing trans fluid/ but after my experience i definitely would change, but following proper procedure
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Old 02-14-2010, 07:08 PM
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I see most are talking about the hydro transmissions. What's the concensus on the manual transmissions?
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Old 02-14-2010, 07:59 PM
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I've used Redline in my M5 for years w/o an issue. I change it just as frequently as the auto's I have. For the cost, $20-$30 worth of fluid every 3 or 4 years is far cheaper than $5000 every 7 or 8 years when the tranny fails. Ever since I started buying BMW's in 99, I've never experienced a failed, notchy or hard shifting tranny, and I by no means have any plans to either.
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650hp 10 X5///M - Stage 2, Vibrant 1794's , gutted cats, custom intake, AC Forged 22's
325hp 98 BMW 740iL - ///M5 6spd, www.bavengine.com w/ Performance Option, electric fan, CF intake tube w/ heatshield, Mag 14816 w/ notched bumper, Bilstein/H&R Stage II/Powerflex

600+hp 02 Harley F150 - MHP900 Stage 3 engine, KB2.3, 8# lower, 60# inj, Walbro FP's

135hp 01 TL1000R - M4 full exhaust, K&N, Yosh box, -1/+2 gears, 2CT's
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Old 02-15-2010, 12:16 PM
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I read about transmissions going bad on the x's before I bought mine... so tell me people lets get honest here, which transmissions go bad?
1. The 5 speed auto?
2. The 6 speed auto?
3. The 5 speed manual?
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Old 02-15-2010, 12:31 PM
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Thanks guys for all the info. Sounds like service intervals are the key. Any of you unhappy with the 6 speed auto?
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Old 02-15-2010, 01:37 PM
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Quote:
Originally Posted by cheappc View Post
I read about transmissions going bad on the x's before I bought mine... so tell me people lets get honest here, which transmissions go bad?
1. The 5 speed auto?
2. The 6 speed auto?
3. The 5 speed manual?
For longevity driven in normal condition nothing beats manual. So if you drive alot and tend to keep your car for a long time get manual.
My Audi A4 manual trans hit 125,000 miles and driven hard after I got my new turbo on it and it still ticking (no slippage symptoms yet). BTW, all v8 X5 come with auto.
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